Eriosoma ulmi
In 3 days ~10% in a week ~20%
Eriosoma ulmi, the elm-currant aphid, is a species of aphid in the family Aphididae found in Asia and Europe. It is a true bug and sucks sap from plants. It was described by Carl Linnaeus in his Systema Naturae, published in 1758. The mite causes abnormal plant growths, known as galls on their primary host, elm trees (Ulmus species). To complete there life-cycle they feed on a secondary host, the roots of currant bushes (Ribes species). Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Sierra Nevada National Park | 🇪🇸 Spain |
More parks will be added in future updates.
Rare
Under 5% of wildlife watchers report an Elm-Currant Aphid sighting in Helsinki on a given day, based on 8 verified sightings from GBIF citizen-science data. It is the 732nd most-seen of the 838 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 20%, if each day is a fresh chance.
June
In that month about 10% of wildlife watchers report an Elm-Currant Aphid in Helsinki on a given day, against under 5% in July to May, the lowest months.
Between 2 and 5 pm
Across all the parks we cover, that three-hour window holds the most Elm-Currant Aphid sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 2 cities where we can rate Elm-Currant Aphid sightings, Helsinki has the highest daily chance: under 5%. Next come Berlin (Germany, under 5%).
GBIF citizen-science records
It is estimated from how often the Elm-Currant Aphid is recorded against all the insects logged in Helsinki (8 verified sightings), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.
